//===- opt.cpp - The LLVM Modular Optimizer -------------------------------===//
-//
+//
// The LLVM Compiler Infrastructure
//
// This file was developed by the LLVM research group and is distributed under
// the University of Illinois Open Source License. See LICENSE.TXT for details.
-//
+//
//===----------------------------------------------------------------------===//
//
// Optimizations may be specified an arbitrary number of times on the command
-// line, they are run in the order specified.
+// line, They are run in the order specified.
//
//===----------------------------------------------------------------------===//
-#include "llvm/Config/config.h"
#include "llvm/Module.h"
#include "llvm/PassManager.h"
-#include "llvm/Bytecode/Reader.h"
-#include "llvm/Bytecode/WriteBytecodePass.h"
+#include "llvm/CallGraphSCCPass.h"
+#include "llvm/Bitcode/ReaderWriter.h"
#include "llvm/Assembly/PrintModulePass.h"
#include "llvm/Analysis/Verifier.h"
+#include "llvm/Analysis/LoopPass.h"
+#include "llvm/Analysis/CallGraph.h"
+#include "llvm/Target/TargetData.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Support/PassNameParser.h"
#include "llvm/System/Signals.h"
+#include "llvm/Support/ManagedStatic.h"
+#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/PluginLoader.h"
+#include "llvm/Support/Streams.h"
#include "llvm/Support/SystemUtils.h"
-#include "llvm/Transforms/LinkAllPasses.h"
+#include "llvm/LinkAllPasses.h"
+#include "llvm/LinkAllVMCore.h"
+#include <iostream>
#include <fstream>
#include <memory>
#include <algorithm>
-
using namespace llvm;
// The OptimizationList is automatically populated with registered Passes by the
// PassNameParser.
//
-static cl::list<const PassInfo*, bool,
- FilteredPassNameParser<PassInfo::Optimization> >
-OptimizationList(cl::desc("Optimizations available:"));
-
+static cl::list<const PassInfo*, bool, PassNameParser>
+PassList(cl::desc("Optimizations available:"));
// Other command line options...
//
static cl::opt<std::string>
-InputFilename(cl::Positional, cl::desc("<input bytecode>"), cl::init("-"));
+InputFilename(cl::Positional, cl::desc("<input bitcode file>"),
+ cl::init("-"), cl::value_desc("filename"));
static cl::opt<std::string>
OutputFilename("o", cl::desc("Override output filename"),
static cl::opt<bool>
NoOutput("disable-output",
- cl::desc("Do not write result bytecode file"), cl::Hidden);
+ cl::desc("Do not write result bitcode file"), cl::Hidden);
static cl::opt<bool>
NoVerify("disable-verify", cl::desc("Do not verify result module"), cl::Hidden);
+static cl::opt<bool>
+VerifyEach("verify-each", cl::desc("Verify after each transform"));
+
+static cl::opt<bool>
+StripDebug("strip-debug",
+ cl::desc("Strip debugger symbol info from translation unit"));
+
+static cl::opt<bool>
+DisableInline("disable-inlining", cl::desc("Do not run the inliner pass"));
+
+static cl::opt<bool>
+DisableOptimizations("disable-opt",
+ cl::desc("Do not run any optimization passes"));
+
+static cl::opt<bool>
+StandardCompileOpts("std-compile-opts",
+ cl::desc("Include the standard compile time optimizations"));
+
static cl::opt<bool>
Quiet("q", cl::desc("Obsolete option"), cl::Hidden);
static cl::alias
QuietA("quiet", cl::desc("Alias for -q"), cl::aliasopt(Quiet));
+static cl::opt<bool>
+AnalyzeOnly("analyze", cl::desc("Only perform analysis, no optimization"));
+
+// ---------- Define Printers for module and function passes ------------
+namespace {
+
+struct CallGraphSCCPassPrinter : public CallGraphSCCPass {
+ static char ID;
+ const PassInfo *PassToPrint;
+ CallGraphSCCPassPrinter(const PassInfo *PI) :
+ CallGraphSCCPass((intptr_t)&ID), PassToPrint(PI) {}
+
+ virtual bool runOnSCC(const std::vector<CallGraphNode *>&SCC) {
+ if (!Quiet) {
+ cout << "Printing analysis '" << PassToPrint->getPassName() << "':\n";
+
+ for (unsigned i = 0, e = SCC.size(); i != e; ++i) {
+ Function *F = SCC[i]->getFunction();
+ if (F)
+ getAnalysisID<Pass>(PassToPrint).print(cout, F->getParent());
+ }
+ }
+ // Get and print pass...
+ return false;
+ }
+
+ virtual const char *getPassName() const { return "'Pass' Printer"; }
+
+ virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+ AU.addRequiredID(PassToPrint);
+ AU.setPreservesAll();
+ }
+};
+
+char CallGraphSCCPassPrinter::ID = 0;
+
+struct ModulePassPrinter : public ModulePass {
+ static char ID;
+ const PassInfo *PassToPrint;
+ ModulePassPrinter(const PassInfo *PI) : ModulePass((intptr_t)&ID),
+ PassToPrint(PI) {}
+
+ virtual bool runOnModule(Module &M) {
+ if (!Quiet) {
+ cout << "Printing analysis '" << PassToPrint->getPassName() << "':\n";
+ getAnalysisID<Pass>(PassToPrint).print(cout, &M);
+ }
+
+ // Get and print pass...
+ return false;
+ }
+
+ virtual const char *getPassName() const { return "'Pass' Printer"; }
+
+ virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+ AU.addRequiredID(PassToPrint);
+ AU.setPreservesAll();
+ }
+};
+
+char ModulePassPrinter::ID = 0;
+struct FunctionPassPrinter : public FunctionPass {
+ const PassInfo *PassToPrint;
+ static char ID;
+ FunctionPassPrinter(const PassInfo *PI) : FunctionPass((intptr_t)&ID),
+ PassToPrint(PI) {}
+
+ virtual bool runOnFunction(Function &F) {
+ if (!Quiet) {
+ cout << "Printing analysis '" << PassToPrint->getPassName()
+ << "' for function '" << F.getName() << "':\n";
+ }
+ // Get and print pass...
+ getAnalysisID<Pass>(PassToPrint).print(cout, F.getParent());
+ return false;
+ }
+
+ virtual const char *getPassName() const { return "FunctionPass Printer"; }
+
+ virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+ AU.addRequiredID(PassToPrint);
+ AU.setPreservesAll();
+ }
+};
+
+char FunctionPassPrinter::ID = 0;
+
+struct LoopPassPrinter : public LoopPass {
+ static char ID;
+ const PassInfo *PassToPrint;
+ LoopPassPrinter(const PassInfo *PI) :
+ LoopPass((intptr_t)&ID), PassToPrint(PI) {}
+
+ virtual bool runOnLoop(Loop *L, LPPassManager &LPM) {
+ if (!Quiet) {
+ cout << "Printing analysis '" << PassToPrint->getPassName() << "':\n";
+ getAnalysisID<Pass>(PassToPrint).print(cout,
+ L->getHeader()->getParent()->getParent());
+ }
+ // Get and print pass...
+ return false;
+ }
+
+ virtual const char *getPassName() const { return "'Pass' Printer"; }
+
+ virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+ AU.addRequiredID(PassToPrint);
+ AU.setPreservesAll();
+ }
+};
+
+char LoopPassPrinter::ID = 0;
+
+struct BasicBlockPassPrinter : public BasicBlockPass {
+ const PassInfo *PassToPrint;
+ static char ID;
+ BasicBlockPassPrinter(const PassInfo *PI)
+ : BasicBlockPass((intptr_t)&ID), PassToPrint(PI) {}
+
+ virtual bool runOnBasicBlock(BasicBlock &BB) {
+ if (!Quiet) {
+ cout << "Printing Analysis info for BasicBlock '" << BB.getName()
+ << "': Pass " << PassToPrint->getPassName() << ":\n";
+ }
+
+ // Get and print pass...
+ getAnalysisID<Pass>(PassToPrint).print(cout, BB.getParent()->getParent());
+ return false;
+ }
+
+ virtual const char *getPassName() const { return "BasicBlockPass Printer"; }
+
+ virtual void getAnalysisUsage(AnalysisUsage &AU) const {
+ AU.addRequiredID(PassToPrint);
+ AU.setPreservesAll();
+ }
+};
+
+char BasicBlockPassPrinter::ID = 0;
+inline void addPass(PassManager &PM, Pass *P) {
+ // Add the pass to the pass manager...
+ PM.add(P);
+
+ // If we are verifying all of the intermediate steps, add the verifier...
+ if (VerifyEach) PM.add(createVerifierPass());
+}
+
+void AddStandardCompilePasses(PassManager &PM) {
+ PM.add(createVerifierPass()); // Verify that input is correct
+
+ addPass(PM, createLowerSetJmpPass()); // Lower llvm.setjmp/.longjmp
+
+ // If the -strip-debug command line option was specified, do it.
+ if (StripDebug)
+ addPass(PM, createStripSymbolsPass(true));
+
+ if (DisableOptimizations) return;
+
+ addPass(PM, createRaiseAllocationsPass()); // call %malloc -> malloc inst
+ addPass(PM, createCFGSimplificationPass()); // Clean up disgusting code
+ addPass(PM, createPromoteMemoryToRegisterPass());// Kill useless allocas
+ addPass(PM, createGlobalOptimizerPass()); // Optimize out global vars
+ addPass(PM, createGlobalDCEPass()); // Remove unused fns and globs
+ addPass(PM, createIPConstantPropagationPass());// IP Constant Propagation
+ addPass(PM, createDeadArgEliminationPass()); // Dead argument elimination
+ addPass(PM, createInstructionCombiningPass()); // Clean up after IPCP & DAE
+ addPass(PM, createCFGSimplificationPass()); // Clean up after IPCP & DAE
+
+ addPass(PM, createPruneEHPass()); // Remove dead EH info
+
+ if (!DisableInline)
+ addPass(PM, createFunctionInliningPass()); // Inline small functions
+ addPass(PM, createArgumentPromotionPass()); // Scalarize uninlined fn args
+
+ addPass(PM, createTailDuplicationPass()); // Simplify cfg by copying code
+ addPass(PM, createInstructionCombiningPass()); // Cleanup for scalarrepl.
+ addPass(PM, createCFGSimplificationPass()); // Merge & remove BBs
+ // FIXME: Temporary!
+ addPass(PM, createScalarReplAggregatesPass(512)); // Break up aggregate allocas
+ addPass(PM, createInstructionCombiningPass()); // Combine silly seq's
+ addPass(PM, createCondPropagationPass()); // Propagate conditionals
+
+ addPass(PM, createTailCallEliminationPass()); // Eliminate tail calls
+ addPass(PM, createCFGSimplificationPass()); // Merge & remove BBs
+ addPass(PM, createReassociatePass()); // Reassociate expressions
+ addPass(PM, createLoopRotatePass());
+ addPass(PM, createLICMPass()); // Hoist loop invariants
+ addPass(PM, createLoopUnswitchPass()); // Unswitch loops.
+ addPass(PM, createInstructionCombiningPass()); // Clean up after LICM/reassoc
+ addPass(PM, createIndVarSimplifyPass()); // Canonicalize indvars
+ addPass(PM, createLoopUnrollPass()); // Unroll small loops
+ addPass(PM, createInstructionCombiningPass()); // Clean up after the unroller
+ addPass(PM, createLoadValueNumberingPass()); // GVN for load instructions
+ addPass(PM, createGCSEPass()); // Remove common subexprs
+ addPass(PM, createSCCPPass()); // Constant prop with SCCP
+
+ // Run instcombine after redundancy elimination to exploit opportunities
+ // opened up by them.
+ addPass(PM, createInstructionCombiningPass());
+ addPass(PM, createCondPropagationPass()); // Propagate conditionals
+
+ addPass(PM, createDeadStoreEliminationPass()); // Delete dead stores
+ addPass(PM, createAggressiveDCEPass()); // SSA based 'Aggressive DCE'
+ addPass(PM, createCFGSimplificationPass()); // Merge & remove BBs
+ addPass(PM, createSimplifyLibCallsPass()); // Library Call Optimizations
+ addPass(PM, createDeadTypeEliminationPass()); // Eliminate dead types
+ addPass(PM, createConstantMergePass()); // Merge dup global constants
+}
+
+} // anonymous namespace
+
//===----------------------------------------------------------------------===//
// main for opt
//
int main(int argc, char **argv) {
+ llvm_shutdown_obj X; // Call llvm_shutdown() on exit.
try {
cl::ParseCommandLineOptions(argc, argv,
- " llvm .bc -> .bc modular optimizer\n");
+ " llvm .bc -> .bc modular optimizer and analysis printer \n");
sys::PrintStackTraceOnErrorSignal();
- // Allocate a full target machine description only if necessary...
+ // Allocate a full target machine description only if necessary.
// FIXME: The choice of target should be controllable on the command line.
std::auto_ptr<TargetMachine> target;
- TargetMachine* TM = NULL;
std::string ErrorMessage;
// Load the input module...
- std::auto_ptr<Module> M(ParseBytecodeFile(InputFilename, &ErrorMessage));
+ std::auto_ptr<Module> M;
+ if (MemoryBuffer *Buffer
+ = MemoryBuffer::getFileOrSTDIN(InputFilename, &ErrorMessage)) {
+ M.reset(ParseBitcodeFile(Buffer, &ErrorMessage));
+ delete Buffer;
+ }
+
if (M.get() == 0) {
- std::cerr << argv[0] << ": ";
+ cerr << argv[0] << ": ";
if (ErrorMessage.size())
- std::cerr << ErrorMessage << "\n";
+ cerr << ErrorMessage << "\n";
else
- std::cerr << "bytecode didn't read correctly.\n";
+ cerr << "bitcode didn't read correctly.\n";
return 1;
}
// Figure out what stream we are supposed to write to...
+ // FIXME: cout is not binary!
std::ostream *Out = &std::cout; // Default to printing to stdout...
if (OutputFilename != "-") {
if (!Force && std::ifstream(OutputFilename.c_str())) {
// If force is not specified, make sure not to overwrite a file!
- std::cerr << argv[0] << ": error opening '" << OutputFilename
- << "': file exists!\n"
- << "Use -f command line argument to force output\n";
+ cerr << argv[0] << ": error opening '" << OutputFilename
+ << "': file exists!\n"
+ << "Use -f command line argument to force output\n";
return 1;
}
- Out = new std::ofstream(OutputFilename.c_str());
+ std::ios::openmode io_mode = std::ios::out | std::ios::trunc |
+ std::ios::binary;
+ Out = new std::ofstream(OutputFilename.c_str(), io_mode);
if (!Out->good()) {
- std::cerr << argv[0] << ": error opening " << OutputFilename << "!\n";
+ cerr << argv[0] << ": error opening " << OutputFilename << "!\n";
return 1;
}
}
// If the output is set to be emitted to standard out, and standard out is a
- // console, print out a warning message and refuse to do it. We don't impress
- // anyone by spewing tons of binary goo to a terminal.
- if (!Force && !NoOutput && CheckBytecodeOutputToConsole(Out,!Quiet)) {
+ // console, print out a warning message and refuse to do it. We don't
+ // impress anyone by spewing tons of binary goo to a terminal.
+ if (!Force && !NoOutput && CheckBitcodeOutputToConsole(Out,!Quiet)) {
NoOutput = true;
}
PassManager Passes;
// Add an appropriate TargetData instance for this module...
- Passes.add(new TargetData("opt", M.get()));
+ Passes.add(new TargetData(M.get()));
+
+ // If -std-compile-opts is given, add in all the standard compilation
+ // optimizations first. This will handle -strip-debug, -disable-inline,
+ // and -disable-opt as well.
+ if (StandardCompileOpts)
+ AddStandardCompilePasses(Passes);
+
+ // otherwise if the -strip-debug command line option was specified, add it.
+ else if (StripDebug)
+ addPass(Passes, createStripSymbolsPass(true));
// Create a new optimization pass for each one specified on the command line
- for (unsigned i = 0; i < OptimizationList.size(); ++i) {
- const PassInfo *Opt = OptimizationList[i];
+ for (unsigned i = 0; i < PassList.size(); ++i) {
+ const PassInfo *PassInf = PassList[i];
+ Pass *P = 0;
+ if (PassInf->getNormalCtor())
+ P = PassInf->getNormalCtor()();
+ else
+ cerr << argv[0] << ": cannot create pass: "
+ << PassInf->getPassName() << "\n";
+ if (P) {
+ addPass(Passes, P);
+
+ if (AnalyzeOnly) {
+ if (dynamic_cast<BasicBlockPass*>(P))
+ Passes.add(new BasicBlockPassPrinter(PassInf));
+ else if (dynamic_cast<LoopPass*>(P))
+ Passes.add(new LoopPassPrinter(PassInf));
+ else if (dynamic_cast<FunctionPass*>(P))
+ Passes.add(new FunctionPassPrinter(PassInf));
+ else if (dynamic_cast<CallGraphSCCPass*>(P))
+ Passes.add(new CallGraphSCCPassPrinter(PassInf));
+ else
+ Passes.add(new ModulePassPrinter(PassInf));
+ }
+ }
- if (Opt->getNormalCtor())
- Passes.add(Opt->getNormalCtor()());
- else if (Opt->getTargetCtor()) {
-#if 0
- if (target.get() == NULL)
- target.reset(allocateSparcTargetMachine()); // FIXME: target option
-#endif
- assert(target.get() && "Could not allocate target machine!");
- Passes.add(Opt->getTargetCtor()(*target.get()));
- } else
- std::cerr << argv[0] << ": cannot create pass: " << Opt->getPassName()
- << "\n";
-
if (PrintEachXForm)
- Passes.add(new PrintModulePass(&std::cerr));
+ Passes.add(new PrintModulePass(&cerr));
}
// Check that the module is well formed on completion of optimization
- if (!NoVerify)
+ if (!NoVerify && !VerifyEach)
Passes.add(createVerifierPass());
- // Write bytecode out to disk or cout as the last step...
- if (!NoOutput)
- Passes.add(new WriteBytecodePass(Out, Out != &std::cout));
+ // Write bitcode out to disk or cout as the last step...
+ if (!NoOutput && !AnalyzeOnly)
+ Passes.add(CreateBitcodeWriterPass(*Out));
// Now that we have all of the passes ready, run them.
Passes.run(*M.get());
+ // Delete the ofstream.
+ if (Out != &std::cout)
+ delete Out;
return 0;
+
} catch (const std::string& msg) {
- std::cerr << argv[0] << ": " << msg << "\n";
+ cerr << argv[0] << ": " << msg << "\n";
} catch (...) {
- std::cerr << argv[0] << ": Unexpected unknown exception occurred.\n";
+ cerr << argv[0] << ": Unexpected unknown exception occurred.\n";
}
+ llvm_shutdown();
return 1;
}
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